Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

CHECK WAIT DETECTION SWITCH SIGNAL

With CONSULT

Start engine.
Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT.

Read out the value of WAIT DETCT SW.

Condition		Display value
Vehicle stopped Engine running A/T selector lever N position Brake pedal depressed	4WD shift switch: 2WD, AUTO or 4H	OFF
	4WD shift switch: 4H to 4LO (While actuator motor is operating.)	OFF → ON
	4WD shift switch: 4LO to 4H (While actuator motor is operating.)	ON → OFF
	4WD shift switch: 4LO	ON

Without CONSULT

Start engine.

Check voltage between transfer control unit harness connector terminal and ground.

Connector	Terminal	Condition		Voltage (Approx.)
E143	43 - Ground	Vehicle stopped Engine running A/T selector lever N position Brake pedal depressed	4WD shift switch: 2WD, AUTO or 4H	Battery voltage
			4WD shift switch: 4H to 4LO (While actuator motor is operating.)	Battery voltage → 0V
			4WD shift switch: 4LO to 4H (While actuator motor is operating.)	0V → Battery voltage
			4WD shift switch: 4LO	0V

Fig 1: Checking Voltage Between Transfer Control Unit Harness Connector Terminal And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Are inspection results normal?

YES: GO TO 5.

NO: GO TO 2.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND WAIT DETECTION SWITCH
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the wait detection switch harness connector.
3. Check continuity between transfer control unit harness connector E143 terminal 43 and wait detection switch harness connector F59 terminal 10.
  Continuity should exist.
  
  Also check harness for short to ground and short to power.
  
  Are inspection results normal?
  
  YES: GO TO 3.
  
  NO: Repair or replace damaged parts.
  
  Fig 2: Checking Continuity Between Transfer Control Unit Harness Connector E143 Terminal 43 And Wait Detection Switch Harness Connector F59 Terminal 10
  Courtesy of NISSAN NORTH AMERICA, INC.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Check continuity between wait detection switch harness connector F59 terminal 11 and ground.
  Continuity should exist.
  
  Also check harness for short to ground and short to power.
  
  Are inspection results normal?
  
  YES: GO TO 4.
  
  NO: Repair open circuit or short to ground or short to power in harness or connectors.
  
  Fig 3: Checking Continuity Between Wait Detection Switch Harness Connector F59 Terminal 11 And Ground
  Courtesy of NISSAN NORTH AMERICA, INC.

CHECK WAIT DETECTION SWITCH

Turn ignition switch OFF. (Stay for at least 5 seconds.)
Disconnect wait detection switch harness connector.
Remove wait detection switch. Refer to "COMPONENT PARTS LOCATION ".

Push and release wait detection switch and check continuity between wait detection switch terminals 10 and 11.

Terminal	Condition	Continuity
10 - 11	Push wait detection switch	Yes
10 - 11	Release wait detection switch	No

Fig 4: Checking Continuity Between Wait Detection Switch Terminals 10 And 11

Courtesy of NISSAN NORTH AMERICA, INC.

Are inspection results normal?

YES: GO TO 5.

NO: Replace wait detection switch.

CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to "REFERENCE VALUE ".

Are inspection results normal?

YES: GO TO 6.

NO: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
CHECK DTC
Drive the vehicle and then perform self-diagnosis.

Are inspection results normal?

YES: Inspection End.

NO: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".